Multiscale crystal plasticity simulation with pseudo-three-dimensional model on ultrafine-graining based on evolution of dislocation structures

Yoshiteru Aoyagi, Naohiro Horibe, Kazuyuki Shizawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In this study, we develop a multiscale crystal plasticity model that represents evolution of dislocation structure on formation process of ultrafine-grained metal based both on dislocation patterning and geometrically necessary dislocation accumulation. A computation on the processes of ultrafine-graining, i.e., generation of dislocation cell and subgrain patterns, evolution of dense dislocation walls, its transition to micro-bands and lamellar dislocation structure and formation of subdivision surrounded by high angle boundaries, is performed by use of the present model. Dislocation patterning depending on activity of slip systems is reproduced introducing slip rate of each slip system into reaction-diffusion equations governing self-organization of dislocation structure and increasing immobilizing rate of dislocation with activation of the secondary slip system. In addition, we investigate the effect of active slip systems to the processes of fine-graining by using the pseudo-three-dimensional model with twelve slip systems of FCC metal.

Original languageEnglish
Title of host publicationMaterials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation
PublisherTrans Tech Publications Ltd
Pages1057-1062
Number of pages6
ISBN (Electronic)978-0-87849-360-9
DOIs
Publication statusPublished - 2008
Event4th International Conference on Nanomaterials by Severe Plastic Deformation - Goslar, Germany
Duration: 2008 Aug 182008 Aug 22

Publication series

NameMaterials Science Forum
Volume584-586 PART 2
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other4th International Conference on Nanomaterials by Severe Plastic Deformation
CountryGermany
CityGoslar
Period08/8/1808/8/22

Keywords

  • Crystal plasticity
  • Dislocation patterning
  • Geometrically necessary dislocation
  • Severe plastic deformation
  • Ultrafine-grained metal

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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